Ratio selection method for a continuously variable transmission
US7097587B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2004 |
| Grant date | Aug 29, 2006 |
| Priority date | — |
| Expiry date | Mar 30, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W30/1882
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A gear ratio selection method for a transmission in a motor vehicle includes detecting a power request, detecting a vehicle speed of the motor vehicle, and providing an engine speed of the motor vehicle. A first desired engine speed is calculated from a first variogram using the power request and the vehicle speed. A second desired engine speed is calculated from a second variogram using the power request and the vehicle speed. A blend factor is determined from the power request, the vehicle speed, and the engine speed. Finally, a blended desired engine speed is calculated from the first desired engine speed, the second desired engine speed, and the blend factor. The blended desired engine speed is used to determine a gear ratio for the continuously variable transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.